著者
西森 拓
出版者
The Surface Science Society of Japan
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.16, no.4, pp.267-272, 1995-04-10 (Released:2009-11-11)
参考文献数
12

風紋と砂丘をコンピュータの中で作ってみた。非常に単純なルールに基づいたシミュレーションではあるが, 現実の系の特徴をよくとらえている。本稿では, 風による砂表面での基本的なダイナミクスを解説するとともに, シミュレーションを通じて, 砂地形のパターン形成のからくりを明らかにしていく。
著者
西森 拓 西村 信一郎
出版者
一般社団法人 日本応用数理学会
雑誌
応用数理 (ISSN:24321982)
巻号頁・発行日
vol.24, no.2, pp.59-65, 2014-06-25 (Released:2017-04-08)
被引用文献数
1

Foraging efficiency of ant colony is studied along the idea of strategy of errors. Strategy of errors is a seemingly-paradoxical group-tactics proposed by Deneubourg, meaning that errors of individual ants in following trail pheromone, rather, increase the efficiency of pheromone-mediated group foraging. In this paper, we first explain the basic idea of strategy of errors, thereafter, extend Deneubourg's original model to entrain more realistic processes. Through numerical calculations of the present model, we obtain two results: i) there are cases where non-uniform (element-dependent) distribution of the degree of errors in an ant colony enables the colony to make an optical foraging, ii) according to the variation of food-supplying environment, a transition of the optimal distribution of errors from the non-uniform distribution to the uniform distribution takes place. These results indicate that the idea of strategy of errors has a more scalability than that originally considered.
著者
西森 拓
出版者
日本鉱物科学会
雑誌
鉱物学雜誌 (ISSN:04541146)
巻号頁・発行日
vol.24, no.2, pp.77-81, 1995-04-30 (Released:2009-08-11)
参考文献数
14

With the increasing interest on nonlinear complex phenomena which are lack of explicit symmetry and are not treatable with established methods of physics, new methodology is now required.Here, using a recent computational method with a new point of view, the global pattern dynamics of dunes is discussed. The present procedure of study is expected to give a new prototype for searching complex systems and to give a way to make collaboration between researchers on different fields.